CN110089001A - Standby mode maintains device - Google Patents

Abstract

It includes: rechargeable battery (13) that standby mode, which maintains device (100), which is configured independently of vehicle battery (2)；The temperature sensor (14) of rechargeable battery (13)；And control unit (19), the control unit (19) has the first action mode, under first action mode, in the state of starting switch (3) disconnection, the energy-saving standby state of in-vehicle information apparatus (4) is maintained according to rechargeable battery (13) or vehicle battery (2) is selectively used by temperature sensor (14) detected value obtained in vehicle (1).

Description

Standby state maintenance device

technical field

The present invention relates to a standby state maintaining device for in-vehicle information equipment.

Background technique

Conventionally, in-vehicle information devices that implement functions such as car navigation and display audio have been installed in cars. Generally, an in-vehicle information device mounted on a gasoline vehicle operates by power supply from a starting battery mounted on the vehicle. In addition, the in-vehicle information device mounted on the electric vehicle operates by power supply from an auxiliary battery mounted on the vehicle (for example, refer to Patent Document 1).

prior art literature

Patent Literature

Patent Document 1

Japanese Patent Laid-Open No. 2013-225968

SUMMARY OF THE INVENTION

The technical problem to be solved by the invention

Conventionally, in information equipment other than in-vehicle use, a standby state (hereinafter referred to as an "energy saving standby state") has been adopted which consumes less power than a state in which the information equipment is operating (hereinafter referred to as an "operational state"). It is small, and the time required for restarting the information equipment is shorter than a state in which the power supply of the information device is completely cut off (hereinafter referred to as "off state"). Specifically, for example, an energy-saving standby state corresponding to the state of S1, S2, or S3 in ACPI (Advanced Configuration and Power Interface: Advanced Configuration and Power Management) is adopted. In these power-saving standby states, the volatile memory is kept powered on, and the data in the memory is kept on standby, and current (so-called "dark current") is continuously consumed during the standby. These power-saving standby states are also referred to as "standby mode," "sleep mode," or "suspend mode," and the like.

In the in-vehicle information equipment, it is difficult to adopt the energy-saving standby state from the viewpoint of avoiding a situation in which the ignition switch or the starter switch (hereinafter collectively referred to as the "starter switch") is turned off, which is caused by dark current. The amount of charge of the starting battery or the auxiliary battery (hereinafter, collectively referred to as "vehicle battery") decreases. Therefore, there is a problem that the start switch must be turned off when the start switch is turned off, and it takes a long time to start the start switch again when the start switch is turned on next time.

In view of this problem, it is considered that a rechargeable battery such as a lithium-ion battery or a nickel-metal hydride battery is provided independently of the vehicle battery, and the rechargeable battery supplies a dark current, thereby reducing the charge amount of the vehicle battery while adopting an energy-saving standby state in the vehicle information device. decrease. However, these rechargeable batteries have a property that the battery life is reduced when charging and discharging are performed in a high temperature environment. Generally, since the use environment of the in-vehicle information equipment is high temperature, when these rechargeable batteries are installed only in the in-vehicle information equipment, there is a problem that the life of the battery is shortened due to charging and discharging in the high-temperature environment.

The present invention has been made to solve the above-mentioned problems, and its object is to shorten the start-up time of the in-vehicle information equipment by adopting the energy-saving standby state, and to prolong the life of the rechargeable battery for the energy-saving standby state.

Technical solutions adopted to solve technical problems

The standby state maintaining device of the present invention includes: a rechargeable battery provided independently of the vehicle battery; a temperature sensor for the rechargeable battery; and a control unit having a first operation mode, and in the first operation In the mode, in the state where the start switch of the vehicle is turned off, the rechargeable battery or the vehicle battery is selectively used according to the detection value obtained by the temperature sensor to maintain the energy-saving standby state of the in-vehicle information equipment.

Invention effect

According to the present invention, since the above-described configuration is adopted, the startup time of the in-vehicle information equipment can be shortened by adopting the energy-saving standby state, and the life of the rechargeable battery for the energy-saving standby state can be prolonged.

Description of drawings

FIG. 1 is an explanatory diagram showing a main part of a standby state maintaining device and the like according to Embodiment 1 of the present invention.

2 is a hardware configuration diagram showing a main part of an information processing unit included in the in-vehicle information device according to Embodiment 1 of the present invention.

3A is a flowchart showing the operation of the standby state maintaining device according to Embodiment 1 of the present invention.

3B is a flowchart showing the operation of the standby state maintaining device according to Embodiment 1 of the present invention.

3C is a flowchart showing the operation of the standby state maintaining device according to Embodiment 1 of the present invention.

4 is an explanatory diagram showing a main part of another standby state maintaining device and the like according to Embodiment 1 of the present invention.

5 is an explanatory diagram showing a main part of another standby state maintaining device and the like according to Embodiment 1 of the present invention.

6 is an explanatory diagram showing a main part of a standby state maintaining device and the like according to Embodiment 2 of the present invention.

7 is a flowchart showing the operation of the standby state maintaining device according to Embodiment 2 of the present invention.

8 is an explanatory diagram showing a main part of a standby state maintaining device and the like according to Embodiment 3 of the present invention.

9 is a flowchart showing the operation of the standby state maintaining device according to Embodiment 3 of the present invention.

10 is an explanatory diagram showing a main part of a standby state maintaining device and the like according to Embodiment 4 of the present invention.

11 is a flowchart showing the operation of the standby state maintaining device according to Embodiment 4 of the present invention.

12 is a flowchart showing another operation of the standby state maintaining device according to Embodiment 4 of the present invention.

13 is a flowchart showing another operation of the standby state maintaining device according to Embodiment 4 of the present invention.

Detailed ways

Hereinafter, in order to explain this invention in more detail, the form for implementing this invention is demonstrated based on drawing.

Embodiment 1.

FIG. 1 is an explanatory diagram showing a main part of a standby state maintaining device and the like according to Embodiment 1 of the present invention. 2 is a hardware configuration diagram showing a main part of an information processing unit included in the in-vehicle information device according to Embodiment 1 of the present invention. 1 and 2 , the standby state maintaining device 100 according to Embodiment 1 will be described.

As shown in FIG. 1 , a vehicle 1 includes a vehicle battery 2 and a starter battery 3 . The vehicle battery 2 is constituted by, for example, a starting battery when the vehicle 1 is a gasoline vehicle, and an auxiliary battery when the vehicle 1 is an electric vehicle. The starter battery 3 is constituted by, for example, an ignition switch when the vehicle 1 is a gasoline vehicle, and is constituted by a starter switch when the vehicle 1 is an electric vehicle. The activation switch 3 also contains communication-based activation requirements.

Furthermore, the vehicle 1 includes the in-vehicle information device 4 and the display device 5 . The in-vehicle information device 4 is constituted by, for example, a dedicated information device provided integrally with the dashboard of the vehicle 1 . The in-vehicle information device 4 is, for example, a device that implements functions of car navigation or display audio. The display device 5 is constituted by, for example, a liquid crystal display or an organic EL (Electro Luminescence) display provided integrally with the in-vehicle information device 4 . The display device 5 displays an image corresponding to the image data output from the in-vehicle information device 4 . Specifically, for example, the display device 5 displays an image representing information related to a travel route under guidance by car navigation, an image representing information related to a musical piece being played back by display audio, or the like.

Hereinafter, main parts of the in-vehicle information device 4 will be described.

The information processing unit 11 realizes the main functions in the in-vehicle information device 4 , that is, the functions of car navigation and display audio. As shown in FIG. 2 , the information processing unit 11 is constituted by a computer, and includes a processor 21 , a first memory 22 and a second memory 23 .

The processor 21 is constituted by, for example, a CPU (Central Processing Unit) and a microcontroller (hereinafter referred to as a "microcomputer"). The first memory 22 is constituted by, for example, a volatile memory such as RAM (Random access memory). The second memory 23 is constituted by, for example, a non-volatile memory such as a ROM (Read only Memory), an HDD (Hard Disk Drive), or an SSD (Solid State Drive).

The second memory 23 stores a program for causing the computer to function as car navigation or display audio. The processor 21 realizes the function of car navigation or display audio by reading and executing the program stored in the second memory 23 . The first memory 22 stores various data and the like used for processing based on the program.

The information processing unit 11 freely switches between an operating state, an off state, and an energy-saving standby state in accordance with an instruction from the microcomputer 18 . The energy-saving standby state of the information processing unit 11 is, for example, standby in a state in which data in the first memory 22 is held by supplying power to the first memory 22 .

The power supply unit 12 supplies power to the information processing unit 11 using the power supplied from the vehicle battery 2 or the rechargeable battery 13 . The power supply unit 12 is constituted by, for example, a DC-DC converter.

The rechargeable battery 13 is provided independently of the vehicle battery 2 . The rechargeable battery 13 is composed of, for example, a lithium-ion battery or a nickel-hydrogen battery. The rechargeable battery 13 has a role of outputting a voltage value corresponding to the charge amount of the rechargeable battery 13 to the microcomputer 18 .

The temperature sensor 14 is a temperature sensor for the rechargeable battery 13 . Specifically, for example, the temperature sensor 14 is provided integrally with the rechargeable battery 13 to detect the main body temperature of the rechargeable battery 13 . Alternatively, for example, the temperature sensor 14 is provided adjacent to the rechargeable battery 13 to detect the ambient temperature of the rechargeable battery 13 . The temperature sensor 14 outputs the value of the detected temperature (hereinafter referred to as a "detected value") to the microcomputer 18 .

A switching circuit 15 is provided between the vehicle battery 2 , the rechargeable battery 13 , and the power supply unit 12 . The switching circuit 15 has one or more switches (not shown), and can freely switch on/off of the electrical connection between the vehicle battery 2 and the power supply unit 12 , on/off of the electrical connection between the rechargeable battery 13 and the power supply unit 12 , and On/off of the electrical connection between the vehicle battery 2 and the rechargeable battery 13 . The on-off of the switch is controlled by the microcomputer 18 .

The charge/discharge control circuit 16 controls the charge and discharge of the rechargeable battery 13 by switching on/off of the switching element 17 provided between the rechargeable battery 13 and the switching circuit 15 according to an instruction from the microcomputer 18 . The switching element 17 is constituted by, for example, an FET (Field Effect Transistor).

In the microcomputer 18, a range (hereinafter referred to as a "reference range") of a value to be compared with the detection value of the temperature sensor 14 is preset. The reference range is set, for example, as a range in which an upper limit value is set and a lower limit value is not set, that is, a range including a value equal to or less than a predetermined threshold value (hereinafter referred to as "first threshold value", for example, +60° C.). The microcomputer 18 is preset with a value to be compared with the charge amount of the rechargeable battery 13 (hereinafter referred to as a "reference amount", for example, a value of 5% of the fully charged state of the rechargeable battery 13 ). In addition, the microcomputer 18 is preset with a value to be compared with the duration of the energy-saving standby state by the vehicle battery 2 (hereinafter referred to as "first reference time", for example, 30 minutes).

The microcomputer 18 has an operation mode (hereinafter referred to as "first operation mode") in which the rechargeable battery 13 or the vehicle battery 2 is selectively used in accordance with the detection value obtained by the temperature sensor 14 in a state where the start switch 3 is turned off. to maintain the energy-saving standby state of the information processing unit 11 . More specifically, in the first operation mode, the microcomputer 18 maintains the energy-saving standby state using the rechargeable battery 13 when the detection value obtained by the temperature sensor 14 is within the basic range, and when the detection value obtained by the temperature sensor 14 When the detected value of is a value outside the reference value range, the vehicle battery 2 is used to maintain the energy saving standby state. The detailed operation of the microcomputer 18 in the first operation mode will be described later with reference to the flowchart of FIG. 3 .

In addition, the microcomputer 18 sets the electrical connection between the vehicle battery 2 and the power supply unit 12 in the switching circuit 15 to the conductive state in the state where the start switch 3 is turned on. Thereby, the power supply unit 12 supplies power to the information processing unit 11 using the electric power supplied from the vehicle battery 2 .

In addition, the microcomputer 18 sets the electrical connection between the vehicle battery 2 and the rechargeable battery 13 in the switching circuit 15 to an on state with the start switch 3 turned on, and sends the rechargeable battery to the charge-discharge control circuit 16 13 Instructions for charging. Thereby, the rechargeable battery 13 is charged.

The control unit 19 includes a switching circuit 15 , a charge-discharge control circuit 16 , a switching element 17 , and a microcomputer 18 . The standby state maintaining device 100 includes a rechargeable battery 13 , a temperature sensor 14 , and a control unit 19 . The in-vehicle information device 4 includes an information processing unit 11 , a power supply unit 12 , and a standby state maintaining device 100 .

Next, the operation of the standby state maintaining device 100 will be described with reference to the flowchart of FIG. 3 , focusing on the operation in the first operation mode of the microcomputer 18 . In the initial state, the start switch 3 is turned on, the power supply unit 12 supplies power to the information processing unit 11 using the power supplied from the vehicle battery 2 , and the information processing unit 11 is in an operating state. In addition, the rechargeable battery 13 is in a state where charging has been completed.

That is, in the switching circuit 15, the electrical connection between the vehicle battery 2 and the power supply unit 12 is turned on, the electrical connection between the rechargeable battery 13 and the power supply unit 12 is disconnected, and the vehicle battery 2 and the rechargeable battery 13 are turned off. The electrical connection between them is disconnected. Then, the switching element 17 is turned off. When the start switch 3 is switched from the ON state to the OFF state, the microcomputer 18 starts the process of step ST1.

First, in step ST1 , the microcomputer 18 acquires the detection value acquired by the temperature sensor 14 from the temperature sensor 14 . Next, in step ST2, the microcomputer 18 determines whether or not the detection value acquired in step ST1 is a value within the reference range.

When the detection value acquired in step ST1 is within the reference range (YES in step ST2 ), the microcomputer 18 starts an energy-saving standby state by the rechargeable battery 13 in step ST3 . That is, the microcomputer 18 switches the electrical connection between the vehicle battery 2 and the power supply unit 12 in the switching circuit 15 from the ON state to the OFF state, and switches the electrical connection between the rechargeable battery 13 and the power supply unit 12 from OFF The state is switched to the ON state. Then, the microcomputer 18 instructs the charge-discharge control circuit 16 to start the discharge of the rechargeable battery 13 . Then, the microcomputer 18 instructs the information processing unit 11 to switch from the operating state to the energy-saving standby state.

On the other hand, when the detection value acquired in step ST1 is a value outside the reference range (NO in step ST2 ), in step ST4 , the microcomputer 18 starts the energy saving standby state by the vehicle battery 2 . That is, the microcomputer 18 instructs the information processing unit 11 to switch from the operating state to the energy-saving standby state.

Following step ST3 , in step ST11 , the microcomputer 18 acquires the detection value acquired by the temperature sensor 14 from the temperature sensor 14 . Next, in step ST12, the microcomputer 18 determines whether or not the detection value acquired in step ST11 is a value within the reference range.

When the detection value acquired in step ST11 is within the reference range (YES in step ST12 ), in step ST13 , the microcomputer 18 acquires a voltage value corresponding to the charge amount of the rechargeable battery 13 from the rechargeable battery 13 . Next, in step ST14, the microcomputer 18 determines whether or not the charge amount of the rechargeable battery 13 is equal to or greater than the reference amount using the voltage value acquired in step ST13.

When the charge amount of the rechargeable battery 13 is the reference amount or more (YES in step ST14 ), the microcomputer 18 returns to the process of step ST11 while continuing the energy saving standby state by the rechargeable battery 13 (step ST15 ).

On the other hand, when the charge amount of the rechargeable battery 13 is less than the reference amount (NO in step ST14 ), in step ST16 , the microcomputer 18 ends the power saving standby state. That is, the microcomputer 18 switches the electrical connection between the rechargeable battery 13 and the power supply unit 12 in the switching circuit 15 from the ON state to the OFF state. Then, the microcomputer 18 instructs the charge-discharge control circuit 16 to complete the discharge of the rechargeable battery 13 . Then, the microcomputer 18 instructs the information processing unit 11 to switch from the energy-saving standby state to the off state.

Then, when the detection value acquired in step ST11 is a value outside the reference range (NO in step ST12 ), in step ST17 , the microcomputer 18 executes the transition from the energy-saving standby state by the rechargeable battery 13 to the vehicle battery 2 from the energy-saving standby state. switch of the energy-saving standby state. That is, the microcomputer 18 switches the electrical connection between the vehicle battery 2 and the power supply unit 12 in the switching circuit 15 from the OFF state to the ON state, and switches the electrical connection between the rechargeable battery 13 and the power supply unit 12 from ON The state switches to the disconnected state. Then, the microcomputer 18 instructs the charge-discharge control circuit 16 to complete the discharge of the rechargeable battery 13 .

Following step ST4 or step ST17 , in step ST21 , the microcomputer 18 calculates the duration of the energy-saving standby state by the vehicle battery 2 . More specifically, the microcomputer 18 calculates a cumulative value of the duration of the energy-saving standby state by the vehicle battery 2 after the start switch 3 is turned off. Next, in step ST22, the microcomputer 18 compares the duration calculated in step ST21 with the first reference time.

When the duration calculated in step ST21 is within the first reference time (NO in step ST22 ), in step ST23 , the microcomputer 18 acquires the detection value obtained by the temperature sensor 14 from the temperature sensor 14 . Next, in step ST24, the microcomputer 18 determines whether or not the detection value acquired in step ST23 is a value within the reference range.

When the detection value acquired in step ST23 is a value outside the reference range (NO in step ST24 ), the microcomputer 18 returns to the process of step ST21 while continuing the energy saving standby state by the vehicle battery 2 (step ST25 ). .

On the other hand, when the detection value acquired in step ST23 is within the reference range (NO in step ST24 ), in step ST26 the microcomputer 18 executes the transition from the energy-saving standby state by the vehicle battery 2 to the charging-based The energy-saving standby state of the battery 13 is switched. That is, the microcomputer 18 switches the electrical connection between the vehicle battery 2 and the power supply unit 12 in the switching circuit 15 from the ON state to the OFF state, and switches the electrical connection between the rechargeable battery 13 and the power supply unit 12 from OFF The state is switched to the ON state. Then, the microcomputer 18 instructs the charge-discharge control circuit 16 to start the discharge of the rechargeable battery 13 . Following step ST26, the microcomputer 18 proceeds to the process of step ST11.

Then, when the duration calculated in step ST21 exceeds the first reference time (YES in step ST22), the microcomputer 18 ends the energy-saving standby state in step ST27. That is, the microcomputer 18 switches the electrical connection between the vehicle battery 2 and the power supply unit 12 in the switching circuit 15 from the ON state to the OFF state. Then, the small information processing unit 11 of the microcomputer 18 issues an instruction to switch from the energy saving standby state to the off state.

Accordingly, the standby state maintaining device 100 according to the first embodiment selectively uses the rechargeable battery 13 or the vehicle battery 2 to maintain the information processing unit 11 in accordance with the detection value obtained by the temperature sensor 14 in a state where the start switch 2 is turned off. energy-saving standby state. By adopting the energy-saving pending state, the startup time of the in-vehicle information device 4 when the startup switch 3 is turned on can be shortened. In addition, by selectively using the rechargeable battery 13 or the vehicle battery 2 according to the detection value obtained by the temperature sensor 14 to maintain the energy-saving standby state, it is possible to suppress the vehicle battery due to dark current while the start switch 3 is turned off. 2 in the case where the charge amount is reduced, and the life of the rechargeable battery 13 can be extended.

More specifically, when the detection value obtained by the temperature sensor 14 is within the basic range, the standby state maintaining device 100 maintains the energy-saving standby state using the rechargeable battery 13 (steps ST11 to ST15 ), and the temperature sensor 14 When the obtained detection value is outside the reference value range, the vehicle battery 2 is used to maintain the energy saving standby state (steps ST21 to ST25 ). By setting the upper limit value of the reference range in advance, that is, setting the first threshold value to an appropriate value, it is possible to prevent the rechargeable battery 13 from being discharged in a high temperature environment. As a result, it is possible to prevent the reduction of the battery life of the rechargeable battery 13 due to the discharge.

In addition, the functions realized by the information processing unit 11 are not limited to the functions of car navigation and display audio. The information processing unit 11 can realize any function in the in-vehicle information device 4 .

In addition to the power-on to the first memory 22 , the energy-saving standby state of the information processing unit 11 may be a state in which power-on to the CPU of the processor 21 is ensured to be on standby. Thereby, the activation time of the in-vehicle information device 4 when the activation switch 3 is turned on can be further shortened.

Also, the microcomputer 18 may be integrated with the microcomputer of the processor 21 . As a result, the number of microcomputers in the in-vehicle information device 4 can be reduced.

Also, the value of the first threshold is not limited to +60°C. The first threshold value can be set to an arbitrary value according to the heat resistance of the rechargeable battery 13 , a characteristic indicating the amount of decrease in battery life due to charge and discharge with respect to temperature, and the like.

Also, the value of the first reference time is not limited to 30 minutes. The first reference time can be set to an arbitrary value according to the capacity of the vehicle battery 2 , the magnitude of the dark current consumed by the information processing unit 11 , and the like.

In addition, the value of the reference amount is not limited to a value of 5% with respect to the fully charged state of the rechargeable battery 13 . The reference amount can be set to an arbitrary value according to the capacity of the rechargeable battery 13 , the magnitude of the dark current consumed by the information processing unit 11 , and the like.

In addition, the reference range can be set as a range in which an upper limit value and a lower limit value are set, that is, a range including a predetermined threshold value (hereinafter referred to as "second threshold value", for example, -20° C.) or more and the first threshold value The range of values below. The rechargeable battery 13 has the property of shortening the battery life when it is charged and discharged in a high temperature environment as described above, and also has the property of reducing the battery life when it is charged and discharged in a low temperature environment. By setting the lower limit value of the reference range in advance, that is, setting the second threshold value to an appropriate value, it is possible to prevent the rechargeable battery 13 from being discharged in a low temperature environment. As a result, it is possible to prevent the reduction of the battery life of the rechargeable battery 13 due to the discharge.

In addition, the charge/discharge control circuit 16 may include a CPU (not shown). In addition, the processing of steps ST13 and ST14 shown in FIG. 3B may be executed by the CPU instead of the microcomputer 18 . An example of the standby state maintaining device 100 and the like in this case is shown in FIG. 4 . The CPU in the charge/discharge control circuit 16 acquires a voltage value corresponding to the charge amount of the rechargeable battery 13 from the rechargeable battery 13 according to an instruction from the microcomputer 18 (step ST13). Next, the CPU in the charge/discharge control circuit 16 determines whether or not the charge amount of the rechargeable battery 13 is equal to or greater than the reference amount using the voltage value acquired in step ST13 (step ST14). The CPU in the charge-discharge control circuit 16 outputs the determination result to the microcomputer 18 .

In addition, in the standby state maintaining apparatus 100 , some components may be provided outside the in-vehicle information device 4 . An example of the standby state maintaining device 100 and the like in this case is shown in FIG. 5 . As shown in FIG. 5 , a rechargeable battery module 6 is provided outside the in-vehicle information device 4 . The in-vehicle information device 4 and the rechargeable battery module 6 are connected by a power supply line for free power supply, and are connected by a control line for free communication. The rechargeable battery 13 , the temperature sensor 14 and the switching element 17 in the standby state maintaining device 100 are provided in the rechargeable battery module 6 . Furthermore, the rechargeable battery module 6 is provided with a CPU 31 that also functions as the charge/discharge control circuit 16 shown in FIG. 1 . The processing shown in FIG. 3 is realized by interlocking the microcomputer 18 provided in the in-vehicle information device 4 and the CPU 31 provided in the rechargeable battery module 6 .

As described above, the standby state maintaining device 100 according to the first embodiment includes: the rechargeable battery 13 provided independently of the vehicle battery 2; the temperature sensor 14 for the rechargeable battery 13; and the control unit 19 There is a first operation mode in which the rechargeable battery 13 or the vehicle battery 2 is selectively used according to the detection value obtained by the temperature sensor 14 in a state where the start switch 3 of the vehicle 1 is turned off. to maintain the energy-saving standby state of the in-vehicle information device 4 . By adopting the energy-saving standby state, the activation time of the in-vehicle information device 4 when the activation switch 3 is turned on can be shortened. In addition, by selectively using the rechargeable battery 13 or the vehicle battery 2 according to the detection value obtained by the temperature sensor 14 to maintain the energy-saving standby state, it is possible to suppress the vehicle battery due to dark current while the start switch 3 is turned off. 2 in the case where the charge amount is reduced, and the life of the rechargeable battery 13 can be extended.

Then, in the first operation mode, the control unit 19 maintains the energy-saving standby state using the rechargeable battery 13 when the detected value is within the basic range (steps ST11 to ST15 ), and when the detected value is outside the reference value range In the case of , the vehicle battery 2 is used to maintain the energy-saving standby state (steps ST21 to ST25 ). By setting the reference range to an appropriate range in advance, it is possible to prevent the rechargeable battery 13 from being discharged in a high temperature environment or a low temperature environment. As a result, it is possible to prevent the reduction of the battery life of the rechargeable battery 13 due to the discharge.

Then, in the first operation mode, when the energy-saving standby state is maintained by the rechargeable battery 13 (steps ST11 to ST15 ), when the detected value is outside the reference range (NO in step ST12 ), the control unit 19 The in-vehicle information device 4 is switched from the energy-saving standby state by the rechargeable battery 13 to the energy-saving standby state by the vehicle battery 2 (step ST17 ). This makes it possible to more reliably prevent the rechargeable battery 13 from being discharged in a high-temperature environment or a low-temperature environment.

Then, in the first operation mode, when the energy-saving standby state is maintained by the rechargeable battery 13 (steps ST11 to ST15 ), when the charge amount of the rechargeable battery 13 is less than the reference amount (NO in step ST14 ), the control unit 19 Ends the power saving standby state (step ST16). By setting the reference amount to an appropriate value, it is possible to prevent overdischarge of the rechargeable battery 13 .

Then, in the first operation mode, when the vehicle battery 2 maintains the energy saving standby state (steps ST21 to ST25 ), when the detected value is within the reference range (NO in step ST24 ), the control unit 19 The in-vehicle information device 4 is switched from the energy-saving standby state by the vehicle battery 2 to the energy-saving standby state by the rechargeable battery 13 (step ST26). Thereby, it is possible to further suppress a decrease in the amount of charge of the vehicle battery 2 due to the dark current.

Then, in the first operation mode, when the energy-saving standby state is maintained by the vehicle battery 2 (steps ST21 to ST25 ), when the duration of the energy-saving standby state by the vehicle battery 2 exceeds the first reference time ( Step ST22: YES), the control unit 19 ends the energy saving standby state (step ST27). Thereby, it is possible to further suppress a decrease in the amount of charge of the vehicle battery 2 due to the dark current.

In addition, the reference range is set as a range including a value equal to or less than the first threshold value, or a range including a value equal to or greater than the second threshold value lower than the first threshold value and equal to or less than the first threshold value. By setting the first threshold value to an appropriate value, it is possible to prevent the rechargeable battery 13 from being discharged in a high temperature environment. Furthermore, by setting the second threshold value to an appropriate value, it is possible to prevent the rechargeable battery 13 from being discharged in a low temperature environment.

In addition, the rechargeable battery 13 is constituted by a lithium ion battery or a nickel metal hydride battery. In general, lithium-ion batteries and nickel-metal hydride batteries are charged and discharged in a high-temperature environment, and the amount of reduction in battery life is greater than that of nickel-cadmium rechargeable batteries. Therefore, by avoiding discharge in a high temperature environment, the battery life can be greatly improved.

Embodiment 2.

6 is an explanatory diagram showing a main part of a standby state maintaining device and the like according to Embodiment 2 of the present invention. 6, the standby state maintaining apparatus 100a of Embodiment 2 is demonstrated. In addition, the same code|symbol is attached|subjected to the same component etc. as the standby state maintaining apparatus 100 etc. of Embodiment 1 shown in FIG. 1, and description is abbreviate|omitted. In addition, since the hardware configuration of the information processing unit 11 is the same as the configuration described with reference to FIG. 2 in the first embodiment, the illustration and description are omitted.

The microcomputer 18a has the same first operation mode as the microcomputer 18 according to the first embodiment. In addition, the microcomputer 18a has an operation mode (hereinafter referred to as "second operation mode") in which the vehicle battery 2 is used to maintain the energy-saving standby state of the information processing unit 11 when the start switch 3 is turned off. The microcomputer 18a executes the second operation mode until a predetermined time (hereinafter referred to as "second reference time", eg, 30 minutes) elapses after the start switch 3 is turned off, and executes the first operation mode after the second reference time elapses.

In addition, the microcomputer 18a, like the microcomputer 18 according to the first embodiment, sets the electrical connection between the vehicle battery 2 and the power supply unit 12 in the switching circuit 15 to the conductive state when the start switch 3 is turned on. . Thereby, the power supply unit 12 supplies power to the information processing unit 11 using the power supplied from the vehicle battery 2 .

In addition, the microcomputer 18a sets the electrical connection between the vehicle battery 2 and the rechargeable battery 13 in the switching circuit 15 to the conductive state when the start switch 3 is turned on, similarly to the microcomputer 18 according to the first embodiment. , and send the charging instruction of the rechargeable battery 13 to the charging and discharging control circuit 16 . Thereby, the rechargeable battery 13 is charged.

The control unit 19a includes a switching circuit 15, a charge-discharge control circuit 16, a switching element 17, and a microcomputer 18a. The standby state maintaining device 100a includes a rechargeable battery 13, a temperature sensor 14, and a control unit 19a.

Next, with reference to the flowchart of FIG. 7 , the operation of the standby state maintaining device 100 a will be described centering on the operations in the first operation mode and the second operation mode of the microcomputer 18 a. In the initial state, the start switch 3 is turned on, the power supply unit 12 supplies power to the information processing unit 11 using the power supplied from the vehicle battery 2 , and the information processing unit 11 is in an operating state. In addition, the rechargeable battery 13 is in a state where charging has been completed.

That is, in the switching circuit 15, the electrical connection between the vehicle battery 2 and the power supply unit 12 is turned on, the electrical connection between the rechargeable battery 13 and the power supply unit 12 is disconnected, and the vehicle battery 2 and the rechargeable battery 13 are turned off. The electrical connection between them is disconnected. Then, the switching element 17 is turned off. When the start switch 3 is switched from the ON state to the OFF state, the microcomputer 18a starts the process of step ST31.

First, in step ST31, the microcomputer 18a starts the operation based on the second operation mode. That is, the microcomputer 18a instructs the information processing unit 11 to switch from the operating state to the energy-saving standby state.

Next, in step ST32, the microcomputer 18a calculates the elapsed time after the start switch 3 is turned off. Next, in step ST33, the microcomputer 18a compares the elapsed time calculated in step ST32 with the second reference time.

When the elapsed time calculated in step ST32 is within the second reference time (NO in step ST33), the microcomputer 18a returns to the process of step ST32 while continuing the operation based on the second operation mode (step ST34).

On the other hand, when the elapsed time calculated in step ST32 exceeds the second reference time (YES in step ST33), the microcomputer 18a executes the first operation mode (step ST35). Specifically, for example, the microcomputer 18a proceeds to the process of step ST23 shown in FIG. 3C .

For example, when the driver stops the vehicle 1 for the purpose of shopping, refueling, or the like, there is a high possibility that the stop is for a short period of time. Even if the vehicle battery 2 is used to maintain the energy-saving standby state of the information processing unit 11 during the above-mentioned short-time parking, the decrease in the charge amount of the vehicle battery 2 due to the dark current is small.

Therefore, the standby state maintaining device 100 a according to the second embodiment executes the second operation mode after the start switch 3 is turned off until a predetermined time, that is, the second reference time elapses, and uses the vehicle battery 2 to maintain the energy saving of the information processing unit 11 standby mode. Thereby, the rechargeable battery 13 can be prevented from being discharged during a short-time stop. As a result, the number of times of charging and discharging of the rechargeable battery 13 can be reduced, and the life of the rechargeable battery 13 can be extended.

In addition, the value of the second reference time is not limited to 30 minutes. The second reference time can be set to an arbitrary value according to the capacity of the vehicle battery 2 , the magnitude of the dark current consumed by the information processing unit 11 , and the like. In addition, the second reference time may be the same value as the first reference time, or may be a value different from the first reference time.

In addition, the standby state maintaining device 100a of the second embodiment can be adopted in various modifications similar to the standby state maintaining device described in the first embodiment. For example, as in the example shown in FIG. 4 , a part of the processing in the first operation mode may be executed by the CPU in the charge/discharge control circuit 16 . Alternatively, for example, as in the example shown in FIG. 5 , the rechargeable battery 13 , the temperature sensor 14 , and the like may be provided outside the in-vehicle information device 4 .

As described above, in the standby state maintaining device 100a according to the second embodiment, the control unit 19a has the second operation mode in which the vehicle battery 2 is used to maintain the energy-saving standby state when the start switch 3 is turned off. By executing the second operation mode, the number of times of charging and discharging of the rechargeable battery 13 can be reduced, and the life of the rechargeable battery 13 can be extended.

Then, the control unit 19a executes the second operation mode until the second reference elapses after the start switch 3 is turned off (steps ST31 to ST34), and executes the first operation mode after the second reference time elapses (step ST35). Thereby, the rechargeable battery 13 can be prevented from being discharged during a short-time stop. As a result, the number of times of charging and discharging of the rechargeable battery 13 can be reduced, and the life of the rechargeable battery 13 can be extended.

Embodiment 3.

8 is an explanatory diagram showing a main part of a standby state maintaining device and the like according to Embodiment 3 of the present invention. Referring to FIG. 8 , the standby state maintaining device 100 b according to the third embodiment will be described. In addition, the same code|symbol is attached|subjected to the same component etc. as the standby state maintaining apparatus 100 etc. of Embodiment 1 shown in FIG. 1, and description is abbreviate|omitted. In addition, since the hardware configuration of the information processing unit 11 is the same as the configuration described with reference to FIG. 2 in the first embodiment, the illustration and description are omitted.

The in-vehicle information device 4 has a GPS (Global Positioning System) receiver 41 . The GPS receiver 41 uses the GPS antenna 7 to receive GPS signals transmitted from GPS satellites (not shown).

In Embodiment 3, the information processing unit 11 realizes the function of car navigation. That is, the information processing unit 11 has a function of calculating the position of the vehicle 1 using the GPS signal received by the GPS receiver 41 . The information processing unit 11 uses the map data stored in the second memory 23 when the start switch 3 is turned off to determine the type of facility corresponding to the position of the vehicle 1 . The information processing unit 11 outputs information indicating the type of the determined facility (hereinafter referred to as "facility information") to the microcomputer 18b.

The microcomputer 18b has the same first operation mode and second operation mode as the microcomputer 18a according to the second embodiment. The microcomputer 18b acquires facility information from the information processing unit 11 when the start switch 3 is turned off. The microcomputer 18b selectively executes the first operation mode or the second operation mode according to the type of facility indicated by the facility information. Specifically, for example, the microcomputer 18b executes the second operation mode when the facility indicated by the facility information is a gas station or a parking lot of a store, and executes the first operation mode in other cases.

In addition, the microcomputer 18b, like the microcomputers 18 and 18a according to Embodiments 1 and 2, sets the electrical connection between the vehicle battery 2 and the power supply unit 12 in the switching circuit 15 while the start switch 3 is turned on. for the conduction state. Thereby, the power supply unit 12 supplies power to the information processing unit 11 using the power supplied from the vehicle battery 2 .

In addition, the microcomputer 18b sets the electrical connection between the vehicle battery 2 and the rechargeable battery 13 in the switching circuit 15 while the start switch 3 is turned on, similarly to the microcomputers 18 and 18a according to the first and second embodiments. In an on state, a charging instruction of the rechargeable battery 13 is sent to the charge and discharge control circuit 16 . Thereby, the rechargeable battery 13 is charged.

The control unit 19b includes a switching circuit 15, a charge-discharge control circuit 16, a switching element 17, and a microcomputer 18b. The standby state maintaining device 100b includes a rechargeable battery 13, a temperature sensor 14, and a control unit 19b.

Next, with reference to the flowchart of FIG. 9 , the operation of the standby state maintaining device 100 b will be described centering on the operations in the first operation mode and the second operation mode of the microcomputer 18 b. In the initial state, the start switch 3 is turned on, the power supply unit 12 supplies power to the information processing unit 11 using the power supplied from the vehicle battery 2 , and the information processing unit 11 is in an operating state. In addition, the rechargeable battery 13 is in a state where charging has been completed. When the start switch 3 is switched from the ON state to the OFF state, the microcomputer 18b starts the process of step ST41.

First, in step ST41 , the microcomputer 18 b acquires facility information from the information processing unit 11 . This facility information indicates the type of facility corresponding to the position of the vehicle 1 when the start switch 3 is turned off.

Next, in step ST42, the microcomputer 18b selects either the first operation mode or the second operation mode according to the type of facility indicated by the facility information acquired in step ST41. Specifically, for example, the microcomputer 18b selects the second operation mode when the facility indicated by the facility information is a gas station or a parking lot of a store, and selects the first operation mode in other cases.

Next, in step ST43, the microcomputer 18b executes the operation mode selected in step ST42.

When the vehicle 1 is parked at a gas station or a parking lot of a store, it is highly likely that the parking is for a short period of time. Even if the vehicle battery 2 is used to maintain the energy-saving standby state of the information processing unit 11 during the above-mentioned short-time parking, the decrease in the charge amount of the vehicle battery 2 due to the dark current is small.

Therefore, when the facility corresponding to the position of the vehicle 1 when the start switch 3 is turned off is a gas station or a parking lot of a store, the standby state maintaining device 100b of the third embodiment executes the second operation mode, and uses the vehicle for The battery 2 maintains the energy-saving standby state of the information processing unit 11 . Thereby, the rechargeable battery 13 can be prevented from being discharged during a short-time stop. As a result, the number of times of charging and discharging of the rechargeable battery 13 can be reduced, and the life of the rechargeable battery 13 can be extended.

In addition, the condition of the selection in step ST42 is not limited to whether the facility indicated by the facility information is a gas station or a parking lot of a store. The standby state maintaining device 100b may select the second operation mode when the facility information indicates a setting with a high possibility of parking for a short period of time, and may select the first operation mode in other cases.

In addition, the standby state maintaining device 100b according to the third embodiment can employ the same various modifications as the standby state maintaining device described in the first embodiment. For example, as in the example shown in FIG. 4 , a part of the processing in the first operation mode may be executed by the CPU in the charge/discharge control circuit 16 . Alternatively, for example, as in the example shown in FIG. 5 , the rechargeable battery 13 , the temperature sensor 14 , and the like may be provided outside the in-vehicle information device 4 .

As described above, in the standby state maintaining device 100b according to the third embodiment, the control unit 19b has the second operation mode in which the vehicle battery 2 is used to maintain the energy-saving standby state when the start switch 3 is turned off. By executing the second operation mode, the number of times of charging and discharging of the rechargeable battery 13 can be reduced, and the life of the rechargeable battery 13 can be extended.

Then, when the start switch 3 is turned off, the control unit 19b acquires information indicating the type of facility corresponding to the position of the vehicle 1 (step ST41 ), and selectively executes the first operation mode or the second operation mode ( Steps ST42, ST43). Thereby, the rechargeable battery 13 can be prevented from being discharged during a short-time stop. As a result, the number of times of charging and discharging of the rechargeable battery 13 can be reduced, and the life of the rechargeable battery 13 can be extended.

Embodiment 4.

10 is an explanatory diagram showing a main part of a standby state maintaining device and the like according to Embodiment 4 of the present invention. Referring to FIG. 10 , the standby state maintaining device 100 c according to the fourth embodiment will be described. In addition, the same code|symbol is attached|subjected to the same component etc. as the standby state maintaining apparatus 100 etc. of Embodiment 1 shown in FIG. 1, and description is abbreviate|omitted. In addition, since the hardware configuration of the information processing unit 11 is the same as the configuration described with reference to FIG. 2 in the first embodiment, the illustration and description are omitted.

The microcomputer 18c operates the cooling device 51 for the rechargeable battery 13 with the start switch 3 turned off. The cooling device 51 is constituted by, for example, a cooling fan provided in the in-vehicle information device 4 . More specifically, the microcomputer 18c operates the cooling device 51 at one of the following three specific examples.

The first specific example is an example in which the cooling device 51 is operated until the detection value by the temperature sensor 14 becomes a value within the reference range after the start switch 3 is turned off. In this case, the microcomputer 18c has the same first operation mode and second operation mode as the microcomputers 18a and 18b according to the second and third embodiments. The microcomputer 18c executes the second operation mode after the start switch 3 is turned off until the detection value by the temperature sensor 14 becomes a value within the reference range, and then executes the first operation mode.

The second specific example is an example in which the cooling device 51 is operated until a predetermined time (hereinafter referred to as "third reference time", for example, 30 minutes) elapses after the start switch 3 is turned off. In this case, the microcomputer 18c has the same first operation mode and second operation mode as the microcomputers 18a and 18b according to the second and third embodiments. The microcomputer 18c executes the second operation mode until the third reference time value elapses after the start switch 3 is turned off, and then executes the first operation mode.

The third specific example is an example in which the cooling device 51 is operated in the first operation mode when the detection value by the temperature sensor 14 is higher than the first threshold value. In this case, the microcomputer 18c has the same first operation mode as that of the microcomputer 18 according to the first embodiment. The microcomputer 18c starts the operation based on the first operation mode when the start switch 3 is turned off.

In addition, the microcomputer 18c, like the microcomputers 18, 18a, and 18b according to Embodiments 1 to 3, switches the electrical connection between the vehicle battery 2 and the power supply unit 12 in the switching circuit 15 in a state where the start switch 3 is turned on. Set to ON state. Thereby, the power supply unit 12 supplies power to the information processing unit 11 using the power supplied from the vehicle battery 2 .

In addition, the microcomputer 18c, like the microcomputers 18, 18a, and 18b according to Embodiments 1 to 3, electrically connects the vehicle battery 2 and the rechargeable battery 13 in the switching circuit 15 with the start switch 3 turned on. It is set to an on state, and an instruction to charge the rechargeable battery 13 is issued to the charge-discharge control circuit 16 . Thereby, the rechargeable battery 13 is charged.

The control unit 19c includes a switching circuit 15, a charge-discharge control circuit 16, a switching element 17, and a microcomputer 18c. The standby state maintaining device 100c includes a rechargeable battery 13, a temperature sensor 14, and a control unit 19c.

Next, with reference to the flowchart of FIG. 11 , the operation of the standby state maintaining device 100 c will be described focusing on the operation of the microcomputer 18 c based on the first specific example described above. In the initial state, the start switch 3 is turned on, the power supply unit 12 supplies power to the information processing unit 11 using the power supplied from the vehicle battery 2 , and the information processing unit 11 is in an operating state. In addition, the rechargeable battery 13 is in a state where charging has been completed.

That is, in the switching circuit 15, the electrical connection between the vehicle battery 2 and the power supply unit 12 is turned on, the electrical connection between the rechargeable battery 13 and the power supply unit 12 is disconnected, and the vehicle battery 2 and the rechargeable battery 13 are turned off. The electrical connection between them is disconnected. Then, the switching element 17 is turned off. When the start switch 3 is switched from the ON state to the OFF state, the microcomputer 18c starts the process of step ST51.

First, in step ST51, the microcomputer 18c starts the operation of the cooling device 51.

Next, in step ST52, the microcomputer 18c starts the operation based on the second operation mode. That is, the microcomputer 18c instructs the information processing unit 11 to switch from the operating state to the energy-saving standby state.

Next, in step ST53 , the microcomputer 18 c acquires the detection value obtained by the temperature sensor 14 from the temperature sensor 14 . Next, in step ST54, the microcomputer 18c determines whether or not the detection value acquired in step ST53 is within the reference range.

When the detection value acquired in step ST53 is outside the reference range (NO in step ST54), the microcomputer 18c continues the operation of the cooling device 51 while continuing the operation based on the second operation mode (step ST55), It returns to the process of step ST53.

On the other hand, when the detection value acquired in step ST53 is within the reference range (YES in step ST54), the microcomputer 18c ends the operation of the cooling device 51 (step ST56), and executes the first operation mode (step ST57). Specifically, for example, the microcomputer 18c proceeds to the process of step ST23 shown in FIG. 3C .

Next, with reference to the flowchart of FIG. 12 , the operation of the standby state maintaining device 100 c will be described focusing on the operation of the microcomputer 18 c based on the second specific example described above. In the initial state, the start switch 3 is turned on, the power supply unit 12 supplies power to the information processing unit 11 using the power supplied from the vehicle battery 2 , and the information processing unit 11 is in an operating state. In addition, the rechargeable battery 13 is in a state where charging has been completed.

That is, in the switching circuit 15, the electrical connection between the vehicle battery 2 and the power supply unit 12 is turned on, the electrical connection between the rechargeable battery 13 and the power supply unit 12 is disconnected, and the vehicle battery 2 and the rechargeable battery 13 are turned off. The electrical connection between them is disconnected. Then, the switching element 17 is turned off. When the start switch 3 is switched from the ON state to the OFF state, the microcomputer 18c starts the process of step ST61.

First, in step ST61, the microcomputer 18c starts the operation of the cooling device 51.

Next, in step ST62, the microcomputer 18c starts the operation based on the second operation mode. That is, the microcomputer 18c instructs the information processing unit 11 to switch from the operating state to the energy-saving standby state.

Next, in step ST63, the microcomputer 18c calculates the elapsed time after the start switch 3 is turned off. Next, in step ST64, the microcomputer 18c compares the duration calculated in step ST63 with the third reference time.

When the elapsed time calculated in step ST63 is within the third reference time (NO in step ST63), the microcomputer 18c continues the operation of the cooling device 51 while continuing the operation based on the second operation mode (step ST65). ), the process returns to step ST63.

On the other hand, when the elapsed time calculated in step ST63 exceeds the third reference time (YES in step ST64), the microcomputer 18c ends the operation of the cooling device 51 (step ST66), and executes the first operation mode ( Step ST67). Specifically, for example, the microcomputer 18c proceeds to the process of step ST23 shown in FIG. 3C .

Next, with reference to the flowchart of FIG. 13 , the operation of the standby state maintaining device 100 c will be described focusing on the operation of the microcomputer 18 c based on the third specific example described above. In the initial state, the start switch 3 is turned on, the power supply unit 12 supplies power to the information processing unit 11 using the power supplied from the vehicle battery 2 , and the information processing unit 11 is in an operating state. In addition, the rechargeable battery 13 is in a state where charging has been completed. When the start switch 3 is switched from the ON state to the OFF state, the microcomputer 18c starts the process of step ST71.

In step ST71, the microcomputer 18c executes the first operation mode. That is, the microcomputer 18c executes the processing shown in FIG. 3 .

Then, in the context of step ST71, the microcomputer 18c executes a process of operating the cooling device 51 when the detection value by the temperature sensor 14 is higher than the first threshold value (step ST72). Specifically, for example, when the microcomputer 18c determines "NO" in step ST2, "NO" in step ST12, or "NO" in step ST24 in step ST71, the microcomputer 18c starts the operation of the cooling device 51. After that, when the microcomputer 18c determines YES in step ST12 or YES in step ST24 in step ST71, or when the operation based on the first operation mode is terminated, the operation of the cooling device 51 is terminated.

Usually, the main body temperature and the ambient temperature of the rechargeable battery 13 are highest after the start switch 3 is turned off, and then gradually decrease with the passage of time. Therefore, after the start switch 3 is turned off, the detection value by the temperature sensor 14 is highly likely to be higher than the first threshold value.

On the other hand, the standby state maintaining device 100 c based on the above-described first specific example or the above-described second specific example maintains the energy-saving standby state (second operation mode) using the vehicle battery 2 while cooling the rechargeable battery 13 after the start switch 3 is turned off. , and transfer to the first action mode after cooling down. Then, the standby state maintaining device 100c based on the third specific example described above cools the rechargeable battery 13 while executing the first operation mode. According to the above-described cooling, it is possible to prevent the rechargeable battery 13 from being discharged in a high temperature environment, and to suppress the occurrence of a situation where the first operation mode ends without the rechargeable battery 13 being maintained in the energy-saving standby state.

In addition, in the above-mentioned second specific example, the value of the third reference time is not limited to 30 minutes. The third reference time can be set to an arbitrary value according to the capacity of the vehicle battery 2 , the magnitude of the dark current consumed by the information processing unit 11 , and the like. In addition, the third reference time may be the same value as the first reference time, or may be a value different from the first reference time.

In addition, the timing at which the microcomputer 18c operates the cooling device 51 is not limited to the timing described in the above-mentioned first to third specific examples. When the start switch 3 is turned off, the microcomputer 18c can operate the cooling device 51 at any timing. However, from the viewpoint of avoiding unnecessary cooling, it is more preferable to activate the cooling device at a timing when the detection value by the temperature sensor 14 is more likely to be higher than the first threshold value after the start switch 3 or the like is turned off. 51 actions.

In addition, the standby state maintaining device 100c according to the fourth embodiment can employ the same various modifications as the standby state maintaining device described in the first embodiment. For example, as in the example shown in FIG. 4 , a part of the processing in the first operation mode may be executed by the CPU in the charge/discharge control circuit 16 . Alternatively, for example, as in the example shown in FIG. 5 , the rechargeable battery 13 , the temperature sensor 14 , and the like may be provided outside the in-vehicle information device 4 . In this case, the cooling device 51 may be constituted by, for example, a cooling fan provided in the rechargeable battery module 6 .

As described above, in the standby state maintaining device 100c according to the fourth embodiment, the control unit 19c operates the cooling device 51 for the rechargeable battery 13 in a state where the start switch 3 is turned off. By cooling using the cooling device 51 , it is possible to suppress the occurrence of a situation in which the first operation mode ends without using the rechargeable battery 13 for maintaining the energy-saving standby state.

Then, after the start switch 3 is turned off, the control unit 19c operates the cooling device 51 for the rechargeable battery 13 until the detected value becomes a value within the reference range, and then executes the first operation mode. As a result, the cooling device 51 can be operated at a timing when the main body temperature and the ambient temperature of the rechargeable battery 13 are high.

Then, after the start switch 3 is turned off, the control unit 19c maintains the energy saving standby state using the vehicle battery 2 until the detected value becomes a value within the reference range. Thereby, the energy-saving standby state can be maintained even during the cooling process, and the rechargeable battery 13 can be prevented from being discharged until the cooling is completed.

Alternatively, after the start switch 3 is turned off, the control unit 19c operates the cooling device 51 for the rechargeable battery 13 until the third reference time elapses, and then executes the first operation mode. As a result, the cooling device 51 can be operated at a timing when the main body temperature and the ambient temperature of the rechargeable battery 13 are high.

Then, after the start switch 3 is turned off, the control unit 19c maintains the energy-saving standby state using the vehicle battery 2 until the third reference time elapses. Thereby, the energy-saving standby state can be maintained even during cooling, and the rechargeable battery 13 can be prevented from being discharged until the cooling is completed.

Alternatively, in the first operation mode, when the detected value is higher than the first threshold value, the control unit 19c operates the cooling device 51 for the rechargeable battery 13 . As a result, the cooling device 51 can be operated at a timing when the main body temperature and the ambient temperature of the rechargeable battery 13 are high.

In addition, within the scope of the invention of the present application, the respective embodiments may be freely combined, or any constituent elements of the respective embodiments may be modified, or any constituent elements may be omitted in the respective embodiments.

Industrial applicability

The standby state maintaining device of the present invention can be used for maintaining an energy-saving standby state in in-vehicle information equipment.

Label description

1 vehicle,

2 Vehicle batteries,

3 Start the switch,

4 In-vehicle information equipment,

5 display device,

6 Rechargeable battery module,

7 GPS antenna,

11 Information Processing Department,

12 Power Section,

13 rechargeable batteries,

14 temperature sensor,

15 switching circuit,

16 Charge and discharge control circuit,

17 Switch elements,

18, 18a, 18b, 18c microcontroller (microcomputer),

19, 19a, 19b, 19c Control Department,

21 processors,

22 The first memory,

23 Second memory,

31 CPU,

41 GPS receivers,

51 Cooling device,

100, 100a, 100b, 100c Standby state maintaining devices.

Claims (17)

1. A device for maintaining a standby state, comprising: A rechargeable battery, which is set up independently of the vehicle battery; a temperature sensor for the rechargeable battery; and a control unit having a first operation mode in which, in a state where a start switch of the vehicle is turned off, selectively using the The rechargeable battery or the vehicle battery is used to maintain the energy-saving standby state of the in-vehicle information equipment. 2. The standby state maintaining device according to claim 1, wherein: In the first operation mode, the control unit maintains the energy-saving standby state using the rechargeable battery when the detection value is within a reference range, and when the detection value is within the reference range In the case of a value other than that, the vehicle battery is used to maintain the energy-saving standby state. 3. The standby state maintaining device according to claim 2, wherein: In the first operation mode, in the case where the energy saving standby state is maintained by the rechargeable battery, when the detection value becomes a value outside the reference range, the control unit controls the in-vehicle information device to Switching from the energy-saving standby state based on the rechargeable battery to the energy-saving standby state based on the vehicle battery. 4. The standby state maintaining device according to claim 2, wherein: In the first operation mode, when the energy-saving standby state is maintained by the rechargeable battery, the control unit ends the energy-saving standby state when the charge amount of the rechargeable battery is less than a reference amount. 5. The standby state maintaining device according to claim 2, wherein: In the first operation mode, when the energy-saving standby state is maintained by the vehicle battery, when the detection value becomes a value within the reference range, the control unit transmits the in-vehicle information to the vehicle battery. The device switches from the energy-saving standby state based on the vehicle battery to the energy-saving standby state based on the rechargeable battery. 6. The standby state maintaining device according to claim 2, wherein: In the first operation mode, when the energy-saving standby state is maintained by the vehicle battery, when the duration of the energy-saving standby state by the vehicle battery exceeds a first reference time, the The control unit ends the energy-saving standby state. 7. The standby state maintaining device according to claim 2, wherein: The reference range is set as a range including a value equal to or less than a first threshold value, or a range including a value equal to or greater than a second threshold value lower than the first threshold value and equal to or less than the first threshold value. 8. The standby state maintaining device according to claim 1, wherein: The control unit has a second operation mode in which the energy saving standby state is maintained using the vehicle battery while the start switch is turned off. 9. The standby state maintaining device according to claim 8, wherein: The control unit executes the second operation mode until a second reference time elapses after the start switch is turned off, and executes the first operation mode after the second reference time elapses. 10. The standby state maintaining device according to claim 8, wherein: The control unit acquires information indicating the type of facility corresponding to the position of the vehicle when the start switch is turned off, and selectively executes the first operation mode or the second operation mode according to the type of facility Action mode. 11. The standby state maintaining device according to claim 1, wherein: The control unit operates the cooling device for the rechargeable battery in a state where the start switch is turned off. 12. The standby state maintaining device according to claim 2, wherein: After the start switch is turned off, the control unit operates the cooling device for the rechargeable battery until the detection value becomes a value within the reference range, and then executes the first operation mode. 13. The standby state maintaining device according to claim 12, characterized in that: The control unit maintains the energy saving standby state using the vehicle battery after the start switch is turned off until the detection value becomes a value within the reference range. 14. The standby state maintaining device according to claim 2, wherein: The control unit operates the cooling device for the rechargeable battery until a third reference time elapses after the start switch is turned off, and then executes the first operation mode. 15. The standby state maintaining device according to claim 14, wherein: The control unit maintains the energy saving standby state using the vehicle battery until the third reference time elapses after the start switch is turned off. 16. The standby state maintaining device according to claim 7, wherein: In the first operation mode, when the detected value is higher than the first threshold value, the control unit operates the cooling device for the rechargeable battery. 17. The standby state maintaining device according to claim 1, wherein: The rechargeable battery is composed of a lithium-ion battery or a nickel-hydrogen battery.